MD Pennsylvania November 1971 casesU.S. v. 137.02 Acres of Land, Etc., Cmwlth. of Pa.Minersville Coal Co. v. Anthracite Export Ass'nUnited States v. AhmadAviation Associates of Puerto Rico v. Dixon CompanyHerman v. C. O. Porter Machinery Co.Servomation Mathias, Inc. v. EnglertPowell v. Kull